Safety device for loading elevators



` 4 .M R un@ \l m \m -MINI \m Q fix f mw; E A E Aug. 7, 1923.

B. F. SPARLING SAFETY DEVICE FOR LOADING ELEVATORS i Filed March 2. 1922 lil Patented Aug. 7, 1323.

@erweiterte heetste@ mlm @esta SAFETY DEVICE` EUR' LOADNGr ELVATORS'.

Application led March 2, 1922. Serial No. 54:0,6/12.v

To all whom t may concern.:

Be it known that I, BENJAMIN F. SPAR- LING, a citizen `of` the United States, residing at Unionville, in the county of Orange and State of New York, have invented certain new and useful Improvements in Safety Devicesfor Loading Elevators; and l do hereby -declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which itappertains to make` and,

. arm 12 of an angle lever 13 by meansof a use the same.

This invention relates to improvements in.

elevators of that-type in which thel starting and stopping mechanisms are controlled by a pull rope, and one of its objects is ,the provi- Y sion of novel means by which the'pull rope may be locked against movement with relation to the car vwhereby to prevent the car from being-.set in motion from one floor during the loading` of the carat another floor.' K

A further object of the invention is the provision of a pull rope lock which shall be simple, durable and eiiicient, which may be readily and quickly applied to any well known form of elevator car, and which may `be readily and quickly operated to lock or release the pull rope.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter fully described and claimed, and illustrated in the accompanying drawing, wherein:

Figure 1 is a view in side elevation of a pull rope lock constructed in accordance with my invention, and

Figure 2 is a top plan view of the pull rope lock, portions of the lock being in horizontal section.

Referring to the drawing` by reference numerals, 1 designates one of the corner posts or timbers of an elevator car, and 2 the pull rope.

The pull rope lock comprises a bracket arm 3 which is secured to the corner post or timber 1 by bolts 4 and which extends from the corner post or timber in the direction of the pull rope 2. The outer end of the bracket arm 3 is provided with a loop 5 through which the pull rope 2 passes. The loop 5 is of U-shape formation, and to provide it one end of the bracket arm 3 is reversely bent. A rope gripping clutch or Jaw 6 is pivotally and slidably connected to and between the sides of the loop 5 through the medium of a bolt 7 which passes through the clutch or j aw A6 and through elongated openings 8 in the sides 0f the loop 5. The forward or active end 91 of the clutch or jaw 6 is concave and the pull rope 2 is adapt-- ed to be clamped between the active end 9 and the bight portion 10 of the loop 5.' The clutch or jaw 6 is provided with an angular shank 11 which extends rearwardly therefrom and which is connected to the shorter pivot 14. The lever 13 has its short arm 12 piveted to the bracket arm 3 by means of a rivet 15. rllhe long arm 16 of thelever 13 extends upwardly, and is provided at its upper end with a weight 17 which. is secured thereto by nuts 18.

The parts are so constructed and arranged that, when the arm 16 of the lever 13 is4 swung into a position forwardly beyond the vertical axis of the pivot 15the clutch oi jaw 6 is moved into and held in inactive position, and such that when the arm 16 is swung into a position rearwardly beyond the vertical axis of the pivot 15, the clutch or jaw 6 is moved into and held in active position. `When the clutch jaw 6 is in inactive position, the pull rope 2 may be freely operated, and when the clutch or jaw 6 is in active position the pull rope is clamped between it and the bight portion 10 of the loop 5 and held against movement with relation to the elevator car. The clutch or jaw 6 is limited in its rearward movement by the bolt 7 engaging the rear end walls of the slots 8, and in view thereof the lever 13 is limited in its forward and downward movement. To limit the downward and rearward movementl of the lever 13, a pin 19 is carried by the sides of the loop 5 for engagement by the shank 11 of the clutch or jaw 6 when the lever is in position to hold the clutch or jaw 6 in rope clamping or active position.

ln practice, the pull rope 2 is locked when the elevator is stopped at a floor so that the rope may not be moved with relation to the elevator car from another floor during` the loading of the car. Wvhen it is desired to start the elevator car, the pull rope is released. To lock the pull rope, it is only necessary to swing the lever 13 rearwardly beyond the vertical axis of the pivot 15, and to release the pull rope it 4is only necessary to swing` the lever 13 forwardly beyond the vertical axis of the pivot 15. The lock may ventio'n-as defined bythe claims'.l

vHaving thus fully described my invention', what I Lelaim as new and desire to 'sec'u're by Letters Patent, is: Y

1. An elevator pull rope look (comprising a bracket yarm 4provided With a -l'oo'p atfone end through which the pull rope 'passesl,a clutch or j'aiv pivota'lly l'and slidably con# nette-d mand betweenrthe sides "of the loop, an Eangle lever pivoted to 4the bracket arm clutchv or jaw, and a Weight 'carried by `'said lever.` f y v. p

4"2. An elevator pull rope look coinprisiiig a bracket arm provided vvith a vrelatively stationary aw, a relatively movable jvafw'v pivotally and slid'ab'ly *connected to the bracket arm, 'alever by v'vhich' "the `relfa'tive'l'f movable jaiv maybe moved 'into r`and held in either inacltive or active position, and meansfor limiting the pivotal movement of the relatively movable 4in one direction.. Y i p,

3. An elevator pull rope lockr comprising aV braclcet arm provided 1 with a relatively stationary javv, a relatively movable pivotajlly and `slidably connected to the bracket arm, an angle lever pivoted to the bracket arm and having pivotal connection With the relatively movable jaw, and a Weight carried by said lever.

4.Y An elevator lpun rope lock comprising a bracket carrying a relatively station ary j'avv, a relatively movable. avv lpivotally and slidfably 'connected to the 4bracket arm, a Vvlever having angularly ldisposed portions, said lever having 'one of its angularly related portions pivoted to` said bracket, the point l.of 'pivoting of said lever being intermediate "the ends of said portion, the free extremity ofsaid portion pivot'ed to an end of said movable javv, and said lever vadapted to have its firee'ext'remity moved from one side to the 'other of the vertical axis of the pivot `-l'i'int of the lever to r'm'ove Iand hold .the `movable active position.

In testimony whereof I 'aiiiX my-signau're in'pr'esenco of-two Witnesses.

BENJAMIN F. SPARLING. Witnesses:

HARRY S. SMITH, L'ivA A. DECKER.

javv into either activeer in` 

